Surgical attachment for cots or beds.



E. E. MGMAHAN.

APPLICATION FILED NOV. 6, 1909.

Patented June 21, 1910.

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SURGICAL ATTACHMENT FOR COTS OR'BEDS.

E. E. MGMAHAN SURGICAL ATTACHMENT FOR COTS 0R BEDS.

APPLICATION FILED NOV. 6,1909.

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E. E. MGMAHAN- SURGIGAL ATTACHMENT FOR 0013s 0R BEDS.

APPLICATION FILED NOV. 6, 1909.

Patented June 21, 1910.

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COLORADO.

SURGICAL ATTACHMENT FOR COTS OR BEDS.

Specification of Letters Patent.

Patented June 21, 1910.

Application filed November 6, 1909. Serial No. 526,621.

To all whom it may concern:

Be it known that I, EDDIE E. MCMAHAN, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented new and useful Improvements in Surgical Attachments for Cots or Beds, of which the following is a specification.

My invention relates to improvements in surgical attachments for cots or beds, its object being to provide an apparatus which may be attached to any cot or bed whereby a patient lying upon the bed may be elevated or shifted from one position to another without causing discomfort, annoyance, or inconvenience.

This apparatus is especially devised for ready attachment to any cot or bed containing patients who have undergone surgical operations and is for the purpose of raising or changing the patient from one position to another with as little inconvenience as possible.

To that end the invention comprises a stretcher frame arranged to rest over the sheets of a bed or cot and detachably secured to a suspending device so that the entire frame or any side or end thereof may be raised by a slow, even movement.

The invent-ion further consists in the details of construction, and combination of parts, which hereinafter will be more particularly set forth, illustrated in the accompanying drawings, and pointed out in the appended claims.

Referring to the drawings, forming a part of the specification, Figure 1 is a side elevation of a bed equipped with my improved apparatus. Fig. 2 is a cross sect-ion of the same, taken on the line 22 of Fig. 1, looking in the direction of the arrow. Fig. 3 is a detail view of the mechanism employed for performing the hoisting function partially broken away to show the construction. Fig. 4: is a sectional view taken on the line ll of Fig. 3, looking in the direction of the arrow. Fig. 5 is a detail view of the stretcher frame on a larger scale with portions broken away. Fig. 6 is a detail view of one of the hollow-bars through which the elevating cables pass, and the manner of securing it to the bed. Fig. 7 is a section on the line 77 of Fig. 6. Fig. 8 is a section on the line 88 of Fig. 6.

Corresponding and like parts are referred to in the following description, and indicated in all the views of the drawings, by the same reference characters.

5 designates a bed having a head piece 6, foot piece 7, and connecting side pieces or bars 8. This bed to which my improvement is attached may be of any well known construction.

Arranged over the mattress of the bed is a stretcher frame 9, consisting of side pieces 10 and 12 and end pieces 13 and 141 connected together by the elbows 15. The piece 13 is provided with a right and left thread, so as to enable the parts to be assembled as shown.

A canvas 16 is secured to the side bars 10 and 12 by engaging buttons 17 threaded into the bars. To stretch the canvas across the frame the bar 12 is turned by means of a lever 18 inserted in holes 19 at one end of the bar arranged for that purpose. Ample thread is cut on the bar 12 and ample travel permitted in the elbows to permit the bar 12 to be given several turns without disengaging the ends from the elbows. A look nut 20 is threaded upon an end portion of the bar to bind against an elbow and prevent turning of the bar and a loosening of the canvas after the latter has been stretched. Each elbow is provided with a small orifice 21 for the reception of an engaging hook 22 secured to branch cables 23. The branch cables are in turn connected to a ring 24 adapted to receive a hook 25 secured to one end of a hoisting cable 26 or 27. The cables 26 and 27 pass over sheaves 28 and 29 mounted upon hollow vertical bars 30, through which the cables pass. The vertical bars 30 are secured to the bed frame near their upper ends by the hand-nut 31 which is threaded upon a hooked shape bolt 32, the bolt passing through a split collar 33, which is normally loose upon the bar 30. It will be seen that when the bar 30 is placed in the desired position and the hooked-bolt 32 engaged with the bed frame all the parts are securely locked together by the single operation of the hand-nut 31. The lower ends of the bars 30 are provided with engaging plates 34, which are loosely fitted upon the bars 30 and provided with elongated slots 35 for the reception of clips 36 provided with nuts 37. By placing the clips 36 over any member or bar of the bed or springs and passing its ends through the slot 35 in the plate 34:, the parts are secured together by the nuts 37.

Secured to one of the side bars 8 of the bed is the hoisting mechanism 38. This hoisting mechanism is arranged to be removably secured in position by the clamping jaws 39 and 40, the jaws 39 being cast integral with the casing 41 and the jaw 40 being threaded upon the securing bolt 42 which is swiveled in a stationary portion 43 cast on the casing 41.

Mounted within the casing 41 is a grooved pulley 44 to which are secured the ends of the hoisting cables 26 and 27, the pulley being provided with two grooves 45 and 46, one for each cable. As seen in Fig. 3, the cables 26 and 27 are made to pass over the pulley from opposite sides thus pulling or releasing both cables simultaneously. Cast integral with the pulley 44 is a beveled worm gear 47 adapted for engagement with the worm 48 journaled in the casing 41 and provided with a manipulating handle49, the shaft 50 upon which a worm 48 is formed is provided with a ball bearing consisting of a ball 51 and adjusting screw 52.

It will be seen that the resisting strain of the cables 26 and 27 transmitted to the pulley 44, and its worm gear 47, is received by the worm 48, forcing it to the right where the consequent friction is received by the ball 51. By this construction a powerful non-vibrating and even travel may be given to the cables.

In operation the parts being assembled as above outlined, the stretcher frame 9 with it's canvas 16 rests upon the bed mattress, the patient lying upon the canvas. To raise the frame horizontally, the corners are engaged by the hooks 22 and cables 23, 25, 26 and 27, and the cables 26 and 27 wound upon the pulley 44 as above outlined. This is a frequent necessity for placing the bed-pan beneath the patient, for which an orifice 53 is cut in the canvas, also for the purpose of changing the sheets or renovating the bedding. To raise the frame at one end or the other, the cable 26 or 27, as the case may be, is released from the ring 24, and if it is desired to tilt the frame by raising one side or the other, the hooks 22 are disengaged on one side, when the cables will draw up the opposite side only.

oeasso From the foregoing description, taken in connection with the accompanying drawings, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which the invention appertains, and while I have described the principle of operation of the invention, together with the device which I now consider to be the embodiment thereof, I desire to have it understood that the device shown is merely illustrative, and that such changes may be made when desired'as are within the scope of the claims appended hereto.

Having thus described the invention what is claimed as new, is

1. In combination with a bed, cot or the like, a stretcher frame, operating means for effecting a raising or a lowering of said stretcher frame and including cables, a pulley adapted to have said cables wind thereon, a casing supporting said pulley and provided with fixed jaws, a movable jaw, and a set screw for clamping said casing to the frame of the bed by means of the said jaws.

2. In an attachment for beds, cots and the like comprising a stretcher frame and hoisting tackle including cables, a pulley having its periphery grooved to receive said cables and having a portion formed with worm thread, and a shaft having a worm intermeshing with the worm thread of said pulley.

3. An attachment for a bed, cot or the like including a stretcher frame, hoisting tackle and vertical bars, means for securing said vertical bars to the bed consisting of hookedbolts, split clamp collars mounted upon said vertical bars and receiving the hooked-bolts, and handnuts mounted upon the hookedbolts and adapted to clamp the split collars to the vertical bars to secure the latter to the bed or the like.

In testimony whereof I affix my signature in presence of two witnesses.

EDDIE E. McMAHAN.

Witnesses \V. J. VVESTFALL, H. C. KEPHART. 

